Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The effects of initial soil moisture conditions on swale flow hydrographs
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0002-2321-164X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0003-0367-3449
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-9938-8217
SENS Sustainable Energy Solutions, 12154 Nacka, Sweden.ORCID iD: 0000-0002-1762-7980
Show others and affiliations
2018 (English)In: Hydrological Processes, ISSN 0885-6087, E-ISSN 1099-1085, Vol. 32, no 5, p. 644-654Article in journal (Refereed) Published
Abstract [en]

The effects of soil water content (SWC) on the formation of run‐off in grass swales draining into astorm sewer system were studied in two 30‐m test swales with trapezoidal cross sections. Swale1 was built in a loamy fine‐sand soil, on a slope of 1.5%, and Swale 2 was built in a sandy loam soil,on a slope of 0.7%. In experimental runs, the swales were irrigated with 2 flow rates reproducing run‐off from block rainfalls with intensities approximately corresponding to 2‐month and 3‐year events. Run‐off experiments were conducted for initial SWC (SWCini) ranging from 0.18 to 0.43 m3/m3. For low SWCini, the run‐off volume was greatly reduced by up to 82%, but at highSWCini, the volume reduction was as low as 15%. The relative swale flow volume reductions decreased with increasing SWCini and, for the conditions studied, indicated a transition of the dominating swale functions from run‐off dissipation to conveyance. Run‐off flow peaks were reduced proportionally to the flow volume reductions, in the range from 4% to 55%. The swale outflow hydrograph lag times varied from 5 to 15 min, with the high values corresponding tolow SWCini. Analysis of swale inflow/outflow hydrographs for high SWCini allowed estimations of the saturated hydraulic conductivities as 3.27 and 4.84 cm/hr in Swales 1 and 2, respectively. Such estimates differed from averages (N = 9) of double‐ring infiltrometer measurements (9.41 and 1.78 cm/hr). Irregularities in swale bottom slopes created bottom surface depression storage of 0.35 and 0.61 m3 for Swales 1 and 2, respectively, and functioned similarly as check bermscontributing to run‐off attenuation. The experimental findings offer implications for drainage swale planning and design: (a) SWCini strongly affect swale functioning in run‐off dissipation and conveyance during the early phase of run‐off, which is particularly important for design storms and their antecedent moisture conditions, and (b) concerning the longevity of swale operation, Swale 1 remains fully functional even after almost 60 years of operation, as judged from its attractive appearance, good infiltration rates (3.27 cm/hr), and high flow capacity.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018. Vol. 32, no 5, p. 644-654
Keywords [en]
field study, flow attenuation and conveyance, grass swales, Green Infrastructure, soil moisture, water balance
National Category
Water Engineering
Research subject
Urban Water Engineering; Centre - Centre for Stormwater Management (DRIZZLE)
Identifiers
URN: urn:nbn:se:ltu:diva-67686DOI: 10.1002/hyp.11446ISI: 000426510600005Scopus ID: 2-s2.0-85041918889OAI: oai:DiVA.org:ltu-67686DiVA, id: diva2:1183726
Funder
Swedish Research Council Formas, 2015-121
Note

Validerad;2018;Nivå 2;2018-02-28 (svasva)

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2023-09-05Bibliographically approved

Open Access in DiVA

fulltext(730 kB)307 downloads
File information
File name FULLTEXT01.pdfFile size 730 kBChecksum SHA-512
cefc9d26dbe6a42170453c6f045ff4470811a793860cb82b5bf76280579484b628b419d884c006728e274298c49dd546cd1161880e9e37c73049110887d2e3f7
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Rujner, HendrikLeonhardt, GüntherMarsalek, JiriPerttu, Anna-MariaViklander, Maria
By organisation
Architecture and Water
In the same journal
Hydrological Processes
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 307 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 382 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf